Elliptic flow in a strongly interacting normal Bose gas
Author(s)
Man, Jay; Lopes, Raphael; Christodoulou, Panagiotis; Schmitt, Julian; Sohmen, Maximilian; Navon, Nir; Smith, Robert P.; Hadzibabic, Zoran; Fletcher, Richard J; ... Show more Show less
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We study the anisotropic, elliptic expansion of a thermal atomic Bose gas released from an anisotropic trapping potential, for a wide range of interaction strengths across a Feshbach resonance. We show that this hydrodynamic phenomenon is for all interaction strengths fully described by a microscopic kinetic model with no free parameters. The success of this description crucially relies on taking into account the reduced thermalizing power of elastic collisions in a strongly interacting gas, for which we derive an analytical theory. We also perform time-resolved measurements that directly reveal the dynamics of the energy transfer between the different expansion axes.
Date issued
2018-07Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics; MIT-Harvard Center for Ultracold AtomsJournal
Physical Review A
Publisher
American Physical Society
Citation
Fletcher, Richard J. et al. "Elliptic flow in a strongly interacting normal Bose gas." Physical Review A 98, 1 (July 2018): 011601(R) © 2018 American Physical Society
Version: Final published version
ISSN
2469-9926
2469-9934